I suppose the only reason for heterosexual only marriages was to fill the earth and have a traceable line to the Messiah. That wouldn't have happened at the pace it has if there was gay marriage.
The earth is filled. Prophecy fulfilled.
Now we can get on with our lives the way we want. Nothing has to fit perfectly anymore because children are not as in demand as they once were.
Another thing: Heterosexual marriages have not proven very effective in longevity. Why not try it the other way? Hmm?
Let's face it, guys understand guys and gals understand gals better than the mixed combo of guy and gal. There has to be an advantage in that, right?